Caatinga, the Brazilian dry tropical forest: can it tolerate climate changes?

Santos, Mariana; Oliveira, Marciel T.; Figueiredo, Karla V.; Falcão, Hiram Marinho; Arruda, Emília; Almeida-Cortez, Jarcilene S.; Sampaio, Everardo V. S. B.; Ometto, Jean Pierre; Menezes, Rômulo S. C.; Oliveira, Antônio Fernando Morais de; Pompelli, Marcelo F.; Antonino, Antônio Celso Dantas

doi:10.1007/s40626-014-0008-0

Cited by 154 publications

(116 citation statements)

References 68 publications

Supporting

Mentioning

107

Contrasting

Unclassified

Order By: Relevance

“…Due to the scarcity of water, much of the soil presents low fertility, particularly regarding the levels of nitrogen, phosphorus and calcium. Currently, more than 10% of the semiarid area has suffered a very high degree of environmental degradation, being susceptible to desertification (Oyama and Nobre, 2004;Cunha et al, 2013;Santos et al, 2014). According to Sampaio et al (2005), the area susceptible to desertification is reasonably defined, with a rate of precipitation by evapotranspiration less than 0.65.…”

Section: Introductionmentioning

confidence: 99%

“…The Caatinga is a relatively poorly studied biome, compared to the other Brazilian biomes, despite the fact that it covers nearly 11% of the Brazilian territory. In 2012 and 2013 this region experienced one of the most severe drought events in 50 years (Santos et al, 2014). Dynamic Global Vegetation Models (DGVMs) are important tools for projecting environmental risks (potential consequences of climate change) and fostering discussions about a more sustainable future of the planet, or in this case of the Caatinga biome.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Calibration of the maximum carboxylation velocity (Vcmax) using data mining techniques and ecophysiological data from the Brazilian semiarid region, for use in Dynamic Global Vegetation Models

et al. 2016

View full text Add to dashboard Cite

The semiarid region of northeastern Brazil, the Caatinga, is extremely important due to its biodiversity and endemism. Measurements of plant physiology are crucial to the calibration of Dynamic Global Vegetation Models (DGVMs) that are currently used to simulate the responses of vegetation in face of global changes. In a field work realized in an area of preserved Caatinga forest located in Petrolina, Pernambuco, measurements of carbon assimilation (in response to light and CO 2 ) were performed on 11 individuals of Poincianella microphylla, a native species that is abundant in this region. These data were used to calibrate the maximum carboxylation velocity (Vc max ) used in the INLAND model. The calibration techniques used were Multiple Linear Regression (MLR), and data mining techniques as the Classification And Regression Tree (CART) and K-MEANS. The results were compared to the UNCALIBRATED model. It was found that simulated Gross Primary Productivity (GPP) reached 72% of observed GPP when using the calibrated Vc max values, whereas the UNCALIBRATED approach accounted for 42% of observed GPP. Thus, this work shows the benefits of calibrating DGVMs using field ecophysiological measurements, especially in areas where field data is scarce or non-existent, such as in the Caatinga.Keywords: Dynamic Global Vegetation Models (DGVM), maximum carboxylation velocity (Vc max ), Caatinga, Gross Primary Productivity (GPP), global changes. Calibração da velocidade máxima de carboxilação (Vc max ), utilizando técnicas de mineração de dados e dados de ecofisiologia da região semiáridabrasileira, para uso em Modelos de Vegetação Globais Dinâmicos. ResumoA região semiárida do nordeste do Brasil, a Caatinga, é extremamente importante devido à sua biodiversidade e endemismo. Medidas de fisiologia vegetal são cruciais para a calibração de Modelos de Vegetação Globais Dinâmicos (DGVMs) que são atualmente usados para simular as respostas da vegetação diante das mudanças globais. Em um trabalho de campo realizado em uma área de floresta preservada na Caatinga localizada em Petrolina, Pernambuco, medidas de assimilação de carbono (em resposta à luz e ao CO 2 ) foram realizadas em 11 indivíduos de Poincianella microphylla, uma espécie nativa que é abundante nesta região.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Calibration of the maximum carboxylation velocity (Vcmax) using data mining techniques and ecophysiological data from the Brazilian semiarid region, for use in Dynamic Global Vegetation Models

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Global climate changes like to have important effects on biodiversity and ecosystem processes (Buytaert et al, 2011), and will undoubtedly affect species distribution and their biological traits (Santos et al, 2014). Several forecasts on climatic changes emphasize a longer and more severe dry season with a general increases in global temperature and tree mortality (IPCC, 2007;Buytaert et al, 2011), and feasible reduction of some STDF areas, including the Caatinga region.…”

Section: Introductionmentioning

confidence: 99%

Climate change effects on the geographic distribution of specialist tree species of the Brazilian tropical dry forests

et al. 2015

View full text Add to dashboard Cite

The aim of this study was to evaluate the ecological niche models (ENMs) for three specialist trees (Anadenanthera colubrina, Aspidosperma pyrifolium and Myracrodruon urundeuva) in seasonally dry tropical forests (SDTFs) in Brazil, considering present and future pessimist scenarios (2080) of climate change. These three species exhibit typical deciduousness and are widely distributed by SDTF in South America, being important in studies of the historical and evolutionary processes experienced by this ecosystem. The modeling of the potential geographic distribution of species was done by the method of maximum entropy (Maxent). We verified a general expansion of suitable areas for occurrence of the three species in future (c.a., 18%), although there was reduction of areas with high environmental suitability in Caatinga region. Precipitation of wettest quarter and temperature seasonality were the predictor variables that most contributed to our models. Climatic changes can provide more severe and longer dry season with increasing temperature and tree mortality in tropics. On this scenario, areas currently occupied by rainforest and savannas could become more suitable for occurrence of the SDTF specialist trees, whereas regions occupied by Caatinga could not support the future level of unsustainable (e.g., aridity). Long-term multidisciplinary studies are necessary to make reliable predictions of the plant's adaptation strategies and responses to climate changes in dry forest at community level. Based on the high deforestation rate, endemism and threat, public policies to minimize the effects of climate change on the biodiversity found within SDTFs must be undertaken rapidly.Keywords: Caatinga biome, deciduous forest, ecological niche model, geographical species distribution. Efeitos das mudanças climáticas sobre a distribuição geográfica de espécies arbóreas especialistas de florestas secas tropicais brasileiras ResumoEste estudo tem como objetivo avaliar a modelagem de nicho ecológico (ENMs) para três espécies especialistas (Anadenanthera colubrina, Aspidosperma pyrifolium e Myracrodruon urundeuva) de florestas tropicais secas (FTSs) no Brasil, considerando o cenário de mudanças climáticas: presente e futuro pessimistas (2080). Estas três espécies são decíduas e amplamente distribuídas pelas FTSs na América do Sul, sendo importante em estudos sobre os processos históricos e evolutivos experimentados por este ecossistema. A modelagem da distribuição geográfica potencial das espécies foi construída através do método de máxima entropia (Maxent). Foi observada uma expansão geral de áreas adequadas para a ocorrência das três espécies no futuro (cerca de 18%), embora tenha existido uma redução das áreas com alta adequabilidade ambiental na região da Caatinga. A precipitação do trimestre mais úmido e a sazonalidade da temperatura foram os fatores que mais contribuíram para os nossos modelos. As mudanças climáticas podem gerar períodos secos mais severos e longos, com aumento da temperatura e mortalidade de árvores ...

show abstract

“…In Brazilian Northeast region, it is estimated that approximately 30% of irrigate areas have saline soils (Aguiar Neto et al, 2007). Salinity levels of soils, associated with a low and irregular rainfall characteristic of this region (Santos et al, 2014), make it marginalized and regarded areas unfit for cultivation.…”

Section: Introductionmentioning

confidence: 99%

Strategies of two tropical woody species to tolerate salt stress

et al. 2017

View full text Add to dashboard Cite

This study aimed to evaluate the leaf primary metabolism in two woody species, Sterculia foetida and Bombacopsis glabra. Both species have seeds rich in oil and they are largely found in regions with irregularities in water availability. Seedlings were grown in a greenhouse from seeds. At 140 days after emergence, 50% of the plants were subjected to salt stress for 23 days, daily receiving 100 mM of NaCl solution. In both species, leaf stomata conductance and water potential decreased quickly under salt stress. The two species showed different strategies in photosynthetic pigment concentration and components of nitrogen metabolism. S. foetida kept the pigment concentration unchanged after 23 days of stress, while B. glabra increased concentration of chlorophyll a and carotenoids. S. foetida showed a high leaf concentration of K+ in stressed plants and a Na+/K+ ratio without differences when compared to control. Thus, S. foetida presented a better ionic balance, while B. glabra invested in photoprotection. Therefore, both species present potential to be planted in Brazilian Northeast, where water deficit and salt stress are challenging for annual crops.

show abstract

Caatinga, the Brazilian dry tropical forest: can it tolerate climate changes?

Cited by 154 publications

References 68 publications

Calibration of the maximum carboxylation velocity (Vcmax) using data mining techniques and ecophysiological data from the Brazilian semiarid region, for use in Dynamic Global Vegetation Models

Calibration of the maximum carboxylation velocity (Vcmax) using data mining techniques and ecophysiological data from the Brazilian semiarid region, for use in Dynamic Global Vegetation Models

Climate change effects on the geographic distribution of specialist tree species of the Brazilian tropical dry forests

Strategies of two tropical woody species to tolerate salt stress

Contact Info

Product

Resources

About